Synthesis of monodisperse 伪-Fe₂O₃ deep-submicron spheres and its application in Li-ion batteries

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• 作者：Lihong Huang^a ; ^b ; Ding Zhu^a ; Yungui Chen^a ; ^{ygchen60@yahoo.com.cn} ; Chaoling Wu^a ; Huaibing Sun^a ; Hong Yang^a
• 关键词：Semiconductors ; Electrical properties ; 伪-Fe2O3 ; Hydrothermal method ; Li-ion batteries
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：1 May, 2012
• 卷：74
• 期：Complete
• 页码：37-39
• 文件大小：514 K

摘要

Monodisperse 伪-Fe₂O₃ deep-submicron spheres of about 200 nm in diameter were successfully synthesized by a facile hydrothermal process based on a Fe(OH)₃ precursor without using any complexing agents, surfactants or templates. The 伪-Fe₂O₃ deep-submicron spheres were investigated with X-ray diffraction, scanning electron microscope and electrochemical tests toward lithium storage. For comparison, properties of commercial Fe₂O₃ were also investigated in this paper. It was found that the as-obtained 伪-Fe₂O₃ showed a high initial reversible capacity of 1681 mAh g^鈭?#xA0;1 and the specific capacity remained 1167 mAh g^鈭?#xA0;1 after 30 cycles at a current density of 150 mA g^鈭?#xA0;1. However, the reversible capacity of the commercial Fe₂O₃ particles faded to 370 mAh g^鈭?#xA0;1 immediately and then gradually decreased to 263 mAh g^鈭?#xA0;1 after 30 cycles.